tailieunhanh - Principles of Digital Modulation

Introduction to digital modulation Relevant Modulation Schemes (QPSK, GMSK, M-Ary Schemes) Coherent and Differential Reception The impact of the mobile channel on digital modulation – noise and interference – random FM (narrowband fading) – intersymbol interference (wideband fading The bit rate defines the rate at which information is passed. l The baud (or signalling) rate defines the number of symbols per second. Each symbol represents n bits, and has M signal states, where M = 2n. This is called M-ary signalling | TOSHIBA-TREL Principles of Digital Modulation Dr Mike Fitton Telecommunications Research Lab Toshiba Research Europe Limited 1 TOSHIBA-TREL Principles of Digital Modulation Outline of Lectures Introduction to digital modulation Relevant Modulation Schemes QPSK GMSK M-Ary Schemes Coherent and Differential Reception The impact of the mobile channel on digital modulation - noise and interference - random FM narrowband fading - intersymbol interference wideband fading 2 TOSHIBA-TREL Digital Modulation Basics

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